All the Spread Charts for the mercury vapour lamps tested in the survey are shown here to the same scale.

It is not possible to make direct comparisons of the lamps, in terms of their ability to stimulate vitamin-D3 synthesis, because each lamp has a slightly different spectral power distribution (as explained in the introduction to the Lighting Survey).

However, these diagrams do give a clear indication of the characteristic shape of the beam produced by each lamp, and the extent of its coverage.

To see clearer, larger versions of individual charts, visit the page featuring the full report of that particular lamp:

Flood MV Lamps:

• The Zoo Med Powersun Flood Lamp
• The early versions of the Wild Inside/ T-Rex Active UV Heat Flood Lamp

Spot MV Lamps:

• The T-Rex Active UV Heat Spot Lamp

Narrow Flood MV Lamps:

• The T-Rex Active UV Heat 100watt Flood Lamp (discontinued version)
• The ReptileUV Mega-Ray Series
• The New T-Rex Active UV Heat 100watt Flood Lamp (latest version)

High UVB Output Mercury Vapour Lamps used in Zoos
Spread charts for the Osram Ultra-Vitalux and the ReptileUV Zoo Mega-Ray are featured within the report.

Continue exploring the Lighting Survey 2005:

Introduction to Lighting Survey

Mercury Vapour Lamps

Fluorescent Tubes

Compact Fluorescent Lamps

All these sections are also accessible from the side navigation bar.